RECON: TNO occultation with 15VD166

Event between 15VD166 and star GA1080:00429422 with event index number of 1016535

Geocentric closest approach at 2019/12/22 09:19:12 UTC

J2000 position of star is 03:47:52.5 +19:12:07
Equinox of date position of star is 03:48:58.1 +19:15:33
Stellar brightness G=14.2, use SENSEUP=64
Star is 163 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=24.7

[RECON map]
TNO is 33.2 AU from the Sun and 32.3 AU from the Earth.
The TNO is moving 20.1 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 529 seconds.
The 1-sigma cross-track error in the shadow position is 5702 km.
The sky-plane scale is 23441.3 km/arcsec.

The TNO has an absolute magnitude Hv=9.4
Diameter=79.8 km assuming a 5% albedo -- 4.0 sec chord
Diameter=32.6 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 15VD166, (2019/12/22 09:19UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:04.1 +16:32:52  0.8 11.74 152
44Zet Per      03:55:23.6 +31:56:29  2.8 12.76 154
13 Tau         03:43:28.3 +19:45:46  5.7  1.40 163
PPM 119423     03:53:27.8 +18:58:34  8.5  1.09 162
PPM 119372     03:49:25.0 +19:21:27  9.5  0.13 162
15VD166        03:49:01.7 +19:15:44 14.2       162
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 1.7 sigma about the mid-time.
The median site spacing is 24.1 km RECON observability=1.0 and success probability=6.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:15:52 -59.3 Dark Down 38.0 253.8 Up 09:00:52 - 09:30:52 6399
Summerland 09:15:52 -59.4 Dark Down 38.2 253.5 Up 09:00:52 - 09:30:52 6391
Penticton 09:15:51 -59.6 Dark Down 38.2 253.9 Up 09:00:51 - 09:30:51 6362
Okanagan Falls 09:15:51 -59.8 Dark Down 38.3 254.0 Up 09:00:51 - 09:30:51 6343
Oliver 09:15:51 -59.9 Dark Down 38.3 254.2 Up 09:00:51 - 09:30:51 6328
Anarchist Mountain Observatory 09:15:49 -60.0 Dark Down 38.2 254.5 Up 09:00:49 - 09:30:49 6313
Oroville 09:15:49 -60.1 Dark Down 38.3 254.4 Up 09:00:49 - 09:30:49 6305
Tonasket 09:15:49 -60.2 Dark Down 38.4 254.6 Up 09:00:49 - 09:30:49 6282
Okanogan 09:15:48 -60.6 Dark Down 38.5 254.7 Up 09:00:48 - 09:30:48 6247
Brewster 09:15:48 -60.9 Dark Down 38.7 254.8 Up 09:00:48 - 09:30:48 6219
Manson/Chelan 09:15:49 -61.2 Dark Down 39.0 254.6 Up 09:00:49 - 09:30:49 6194
Entiat 09:15:48 -61.4 Dark Down 39.1 254.7 Up 09:00:48 - 09:30:48 6172
Wenatchee 09:15:48 -61.6 Dark Down 39.3 254.8 Up 09:00:48 - 09:30:48 6146
Ellensburg 09:15:48 -62.0 Dark Down 39.5 255.0 Up 09:00:48 - 09:30:48 6103
Yakima 09:15:47 -62.4 Dark Down 39.6 255.3 Up 09:00:47 - 09:30:47 6062
Pasco 09:15:42 -62.0 Dark Down 38.8 256.8 Up 09:00:42 - 09:30:42 6042
Toppenish/White Swan 09:15:46 -62.4 Dark Down 39.6 255.6 Up 09:00:46 - 09:30:46 6042
PNWRO 09:15:42 -62.0 Dark Down 38.7 257.1 Up 09:00:42 - 09:30:42 6019
George/Umatilla 09:15:42 -62.3 Dark Down 39.0 256.8 Up 09:00:42 - 09:30:42 6006
Goldendale 09:15:46 -63.1 Dark Down 40.0 255.7 Up 09:00:46 - 09:30:46 5982
The Dalles 09:15:46 -63.4 Dark Down 40.3 255.5 Up 09:00:46 - 09:30:46 5956
Maupin 09:15:45 -63.7 Dark Down 40.3 256.0 Up 09:00:45 - 09:30:45 5915
Madras/Culver 09:15:44 -64.1 Dark Down 40.5 256.4 Up 09:00:44 - 09:30:44 5859
Redmond 09:15:44 -64.4 Dark Down 40.6 256.6 Up 09:00:44 - 09:30:44 5822
Sisters 09:15:45 -64.6 Dark Down 40.9 256.3 Up 09:00:45 - 09:30:45 5820
Bend 09:15:44 -64.6 Dark Down 40.8 256.7 Up 09:00:44 - 09:30:44 5799
Oregon Observatory 09:15:43 -64.8 Dark Down 40.9 256.7 Up 09:00:43 - 09:30:43 5780
La Pine/Gilchrist 09:15:44 -65.0 Dark Down 41.0 256.9 Up 09:00:44 - 09:30:44 5758
North Lake 09:15:41 -65.0 Dark Down 40.7 257.7 Up 09:00:41 - 09:30:41 5719
Paisley 09:15:39 -65.2 Dark Down 40.5 258.5 Up 09:00:39 - 09:30:39 5666
Chiloquin 09:15:42 -66.0 Dark Down 41.5 257.5 Up 09:00:42 - 09:30:42 5640
Lakeview 09:15:37 -65.5 Dark Down 40.5 259.0 Up 09:00:37 - 09:30:37 5615
Niwot 09:14:58 -56.9 Dark Down 29.4 271.1 Low 08:59:58 - 09:29:58 5615
Klamath Falls 09:15:41 -66.2 Dark Down 41.5 257.9 Up 09:00:41 - 09:30:41 5606
Tulelake 09:15:40 -66.3 Dark Down 41.4 258.3 Up 09:00:40 - 09:30:40 5580
Cedarville 09:15:36 -65.9 Dark Down 40.5 259.7 Up 09:00:36 - 09:30:36 5549
Fall River/Burney 09:15:38 -66.9 Dark Down 41.5 259.2 Up 09:00:38 - 09:30:38 5487
Susanville 09:15:35 -66.9 Dark Down 41.0 260.3 Up 09:00:35 - 09:30:35 5428
Gimple 09:15:35 -67.2 Dark Down 41.3 260.4 Up 09:00:35 - 09:30:35 5397
Greenville 09:15:36 -67.2 Dark Down 41.3 260.3 Up 09:00:36 - 09:30:36 5396
Quincy 09:15:35 -67.4 Dark Down 41.3 260.5 Up 09:00:35 - 09:30:35 5375
Portola 09:15:33 -67.2 Dark Down 41.0 260.9 Up 09:00:33 - 09:30:33 5367
Reno 09:15:31 -67.0 Dark Down 40.6 261.6 Up 09:00:31 - 09:30:31 5346
Carson City 09:15:31 -67.2 Dark Down 40.6 262.0 Up 09:00:31 - 09:30:31 5308
Yerington 09:15:29 -66.9 Dark Down 40.1 262.6 Up 09:00:29 - 09:30:29 5295
Gardnerville 09:15:30 -67.3 Dark Down 40.6 262.2 Up 09:00:30 - 09:30:30 5283
Hawthorne 09:15:26 -66.8 Dark Down 39.8 263.3 Up 09:00:26 - 09:30:26 5252
Tonopah 09:15:21 -66.2 Dark Down 38.8 264.7 Up 09:00:21 - 09:30:21 5219
Lee Vining 09:15:26 -67.5 Dark Down 40.2 263.5 Up 09:00:26 - 09:30:26 5187
Bishop 09:15:24 -67.3 Dark Down 39.7 264.4 Up 09:00:24 - 09:30:24 5132
Beatty 09:15:19 -66.5 Dark Down 38.5 265.9 Up 09:00:19 - 09:30:19 5103
Indian Springs 09:15:15 -65.8 Dark Down 37.7 266.8 Up 09:00:15 - 09:30:15 5082
Lone Pine 09:15:21 -67.5 Dark Down 39.6 265.3 Up 09:00:21 - 09:30:21 5055
Henderson 09:15:12 -65.6 Dark Down 37.1 267.7 Up 09:00:12 - 09:30:12 5035
Patrick 09:15:08 -65.0 Dark Down 36.3 268.8 Up 09:00:08 - 09:30:08 4984
Searchlight/Boulder City 09:15:11 -65.8 Dark Down 37.1 268.1 Up 09:00:11 - 09:30:11 4975
DCO 09:15:06 -64.6 Dark Down 35.7 269.4 Up 09:00:06 - 09:30:06 4962
Kingman/Dolan Springs 09:15:08 -65.2 Dark Down 36.4 268.8 Up 09:00:08 - 09:30:08 4958
Laughlin/Bullhead City 09:15:11 -65.6 Dark Down 36.8 268.6 Up 09:00:11 - 09:30:11 4948
Mohave Valley 09:15:10 -65.7 Dark Down 36.9 268.8 Up 09:00:10 - 09:30:10 4919
CPSLO 09:15:27 -70.0 Dark Down 41.7 264.7 Up 09:00:27 - 09:30:27 4887
Lake Havasu City 09:15:08 -65.7 Dark Down 36.7 269.2 Up 09:00:08 - 09:30:08 4880
Parker 09:15:08 -65.8 Dark Down 36.6 269.5 Up 09:00:08 - 09:30:08 4843
Blythe 09:15:08 -66.2 Dark Down 36.9 269.7 Up 09:00:08 - 09:30:08 4783
Wildwood 09:15:19 -69.1 Dark Down 40.2 267.0 Up 09:00:19 - 09:30:19 4781
Idyllwild 09:15:14 -67.8 Dark Down 38.6 268.4 Up 09:00:14 - 09:30:14 4766
Calipatria 09:15:09 -67.1 Dark Down 37.7 269.6 Up 09:00:09 - 09:30:09 4717
Yuma 09:15:07 -66.5 Dark Down 36.9 270.4 Up 09:00:07 - 09:30:07 4683

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 15VD166, (2019/12/22 09:19UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 11.74 152
44Zet Per      03:54:07.9 +31:53:01  2.8 12.76 154
13 Tau         03:42:18.9 +19:42:01  5.7  1.40 163
PPM 119423     03:52:18.6 +18:55:03  8.5  1.09 162
PPM 119372     03:48:15.7 +19:17:50  9.5  0.13 162
15VD166        03:47:52.5 +19:12:07 14.2       163
Positions are for J2000

Event circumstances last updated at 2018/12/01 22:19:20 UT

Marc W. Buie, Southwest Research Institute

RECON